Journal article
Helmholtz resonance of pitot pressure measurements in impulsive hypersonic test facilities
AIAA Journal, Vol.47(10), pp.2430-2439
2009
Abstract
Experimental pitot pressure measurements in impulse facilities have typically had large-scale harmonic fluctuations associated with them. A combined experimental and numerical approach is used to investigate if a Helmholtz resonance is created from the shrouding that protects the pressure sensor from particle impact, rather than from disturbances being present in the freestream. To verify this experimentally, hydraulic oil was used to change the sound speed in the cavity. Numerical calculations of the pitot probe were used to show that both the steady and the expected transient inflow cause a Helmholtz resonance of similar period. However, a 5% isothermal level of freestream noise was required to match the experimental fluctuation levels. Viscous effects were also shown to be significant during the initial transient response of the pressure measurement. A new pitot probe design was successfully tested and shown to be able to reduce the magnitude and period of the fluctuations.
Details
- Title
- Helmholtz resonance of pitot pressure measurements in impulsive hypersonic test facilities
- Authors
- Matthew McGilvray (Author) - University of QueenslandP A Jacobs (Author) - University of QueenslandR G Morgan (Author) - University of QueenslandR J Gollan (Author) - University of QueenslandCarolyn Jacobs (Author) - University of Queensland
- Publication details
- AIAA Journal, Vol.47(10), pp.2430-2439
- Publisher
- American Institute of Aeronautics and Astronautics, Inc.
- DOI
- 10.2514/1.42543
- ISSN
- 0001-1452
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Science and Engineering - Legacy
- Language
- English
- Record Identifier
- 99451203202621
- Output Type
- Journal article
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